Regarding a 700 donor action,any long action belted magnum chambering(.532" boltface),will work without modifications. That means 264Win,7mmRemmag,300Winny,etc.
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<br>If a Sako extractor on the 700 appeals to you,than any standard long action chambering will suffice(.473" boltface). That means 25-06,270,280,30-06,etc.
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<br>Lots of donor choices available to you,in either route...............

Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."